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License Numbers: VA 2701001733 • WV 001545 • NC L.34582 & U.33082 <br /> K. Perform O² and CO² combustion efficiency tests. Check stack discharge temperature and adjust for <br />maximum efficiency. <br /> L. Verify correct water level in expansion tank, adjust as required. <br /> M. Log all operating conditions on applicable log sheet. <br /> N. Clock gas meter to determine fuel volume when over or under firing is suspected. (Gas fired only.) <br /> O. Review findings of inspection with owner personnel. <br /> <br /> 3. OPERATING MAINTENANCE AND INSPECTION – <br /> <br /> A. Observe burner flame. <br /> B. Observe boiler operation through one (1) complete cycle, including low fire to high fire and post purge <br />operation. <br /> C. Check operating water pressures. <br /> D. Check operating boiler temperatures. <br /> E. Check water level in expansion tank. <br /> F. Log all operating conditions. <br /> G. Review findings with owner personnel <br /> <br /> <br /> <br /> <br />Page 7 of 12 <br />DocuSign Envelope ID: 150F5FF0-7BF2-4B98-90F6-34A8158BF405